Calendar UI does not update in some cases

[designus]

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Plunkr Case (Bug Reports)
http://plnkr.co/edit/okzYh53odGHzV5zOjWgf?p=preview

Current behavior
Calendar UI is not updated when disabledDays input property is changed. Calendar UI is only updated when some event is triggered manually (e.g: click on next month)

Expected behavior
Calendar UI should update whenever input props are changed.

Minimal reproduction of the problem with instructions
Toggle disabledDays on and off and check calendar UI.

Please tell us about your environment:

• Angular version: 4.1.3
• PrimeNG version: 4.3.0
  Same problem occurs in the most recent versions as well. Check plunk link.

Other info
It seems that the problem lies within this line:
https://github.com/primefaces/primeng/blob/master/src/app/components/calendar/calendar.ts#L386
"this.currentMonth" is zero based. So if we are in January, "this.currentMonth" value is 0 which results in condition being false.

[ppsdang]

I am also getting this issue while setting minDate. because set minDate is also checking current month which in case of january is zero.

[designus]

In my case, as a temporary solution until this is fixed I added ChangeDetectorRef class detectChanges() method after setting disabledDays property.

[jbreitenbach]

@designus I'm not seeing that adding

.detectChanges(); 

has any effect.
However, changing the month seems to work and this only seems to happen for dates in January.

If you init your plunker with new Date('02/13/2018'); instead of new Date(); the code works as you would expect

[designus]

Yes you are right, it is only for the first month of the year. Thanks for the fix.

[cagataycivici]

Cases are minDate, maxDate, disabledDays and disabledDates